1. The two subdivisions of the nervous system are the central nervous system and
ID: 10758 • Letter: 1
Question
1. The two subdivisions of the nervous system are the central nervous system and the peripheral nervous system. (Points: 1)True
False
2. Repolarization of a neuron to the resting state requires the activation of sodium-potassium pumps. (Points: 1)
True
False
3. During periods of stress or increased activity, the parasympathetic division of the autonomic nervous system predominates; during periods of rest, the sympathetic division of the autonomic nervous system predominates. (Points: 1)
True
False
4. A student noticed that every time he smelled a certain perfume in the hallway, it reminded him of his mother. This is due largely to the activity of the limbic system. (Points: 1)
True
False
5. The central nervous system is composed of (Points: 1)
the brain and spinal cord
the autonomic nervous system and brain
the somatic division and the autonomic division
the sensory division and the motor division
the somatic division and the motor division
6. Electrical impulses are transmitted between components of the central nervous system via (Points: 1)
glial cells
motor neurons
sensory neurons
interneurons
macrophages
7. With each cycle of the sodium-potassium pump, (Points: 1)
sodium is moved into the cell, creating a net negative charge outside the cell.
the net effect is removal of one osmotic particle and one positive charge from inside the cell.
the net effect is removal of one osmotic particle and one negative charge from inside the cell.
the inside of the cell becomes more negative as potassium is pumped out.
two potassium ions and three sodium ions are pumped out of the cell.
8. Cells that provide direct protection and physical support to neurons are (Points: 1)
only located in spinal fluid.
found primarily in lymphatic fluid.
are myelinated.
neuroglial cells.
Schwann cells
9. Oligodendrocytes are similar to Schwann cells in that they: (Points: 1)
are a type of neuroglial cell.
are located in the central nervous system.
conduct nerve impulses.
help neurons regenerate after injury.
are located in the peripheral nervous system.
10. Amyotrophic lateral sclerosis (ALS) is a disease that results from nerve damage in the: (Points: 1)
brain.
diaphragm.
intercostal muscles.
spinal cord.
sensory nerves.
11. Regulation of the production of breast milk, carbohydrate metabolism, and temperature control are some of the functions of the: (Points: 1)
frontal lobe.
midbrain.
medulla oblongata.
thalamus.
hypothalamus.
12. Which of the following is not true regarding the limbic system? (Points: 1)
It controls emotional behavior.
Stimulation of different areas of the limbic system results in feelings of fear, anger, or love.
It includes pathways for the sense of smell.
The midbrain serves as the gateway to and from the limbic system.
Information from the limbic system is interpreted by the cerebrum.
13. Insufficient production of acetylcholine in the synapses of the brain, abnormal tangled neurons, and large deposits of beta amyloid are problems associated with: (Points: 1)
meningitis.
Alzheimer's disease.
rabies.
Parkinson's disease.
epilepsy.
14. Which of the following is typical of spinal cord injuries? (Points: 1)
Most injuries involve the crushing of axons in the spinal cord.
Swelling, caused by bleeding at the site of injury, results in damage to axons.
Macrophages sometimes destroy healthy tissue near the site of injury as they attempt to clear the area of debris.
Several weeks after the injury, fluid-filled cysts form, blocking nerve signals.
all of the above
15. Excitatory neurotransmitters encourage the generation of new electrical impulses by (Points: 1)
stimulating saltatory conduction.
stimulating depolarization of postsynaptic neurons.
inhibiting postsynaptic neurons from repolarizing.
inhibiting presynaptic neurons from depolarizing.
stimulating depolarization of presynaptic neuorons
Explanation / Answer
1. True. CNS then divides to brain and spinal cord. PNS to somatic and autonomic then automatic further divides to sympathetic and parasympathetic 2. True. For repolorization, voltage gated Na+ channels closes and K+ rushes out down its electrochemical gradient returning cell to a more negative state. 3. False. Its the complete opposite. 4. True 5. brain and spinal 6. inter-neurons 7. Na+ into cell, K+out 8. are myleinated 9. type of neuroglial cells. Meaning they produce myelin. oligodendrocytes produce myelin in the CNS and Schwann in the PNS. 10. spinal cord 11. hypothalamus 12. The midbrain serves as the gateway to and from the limbic system. the cerebral cortex does that. 13.Alzheimer's disease. 14. all of the above 15. stimulating depolarization of presynaptic neuoron
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